The Influence of Micro-Character on Macroscopic Properties in Low Permeability Reservoir

Abstract:

The relation of microscopic features and the macroscopic properties such as permeability, porous and oil displacement efficiency in low permeability reservoir is much more complex than in conventional reservoir. Understanding the microscopic features and its influence law to macroscopic properties in low permeability reservoir is key to tapping remain oil. In this paper, the microscopic and macroscopic features and their relationship is studied. Studies suggest that in low permeability reservoir the main reservoir spaces include micro cracks, intergranular pore, intragranular pore and intracrystalline pore. The contribution of micro-cracks to porosity is not big, but its influence to permeability cannot be ignored. Porosity mainly effect by the development degree of pore throat, the bigger radius of pore throats are, the porosity is higher. The permeability and mercury efficiency are affected by feature structure coefficient, which reflect the characteristics of connectivity, it showed a positive correlation between the Coefficient and permeability, but Mercury efficiency and the Coefficient have positive correlation in mesopore reservoir, they have Negative Correlation in low or super-low porosity.

• Periodical: Applied Mechanics and Materials (Volume 535)
• Pages: 631-634
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.535.631
• Online since: February 2014
• Authors: Yan Zhang*, Lin Fei Lei
• Keywords: Feature Structure Coefficient, Low-Permeability Reservoir, Microcracks

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